Pressure filter



(3J0 Model.)

E. S. HUTGHINSON.

PREssURB FILTER. No. 364,932. Patented June 14, 1887.

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UNIED STATES ELIAS S. IIUTGHINSON, OF \VASHINGTON, DISTRICT OF COLUMULA ATENT Fries.

PRESSURE-FILTER.

SPECIFICATION forming part of Letters Patent No. 364,932, dated June 14, 1887.

A ppliention tiled Fflll'llfll) 17, 1887. Serial No. 227,935. (No model.)

To aZZ whom it may concern.-

Beitknown that I, ELiasS. Hu'ronmsoa, a citizen of the United States, residing at \Vaslr ington, in the District of olumbia, have in vented certain new and useful Improvements in lressurel iltcrs, of which the following is a specification.

The object of my invention is to provide a filter of practical construction, adapted for readyapplicationtothcscrvicepipeofahonsc, to deliver a constant supply of filtered water, to have the surface of the filtering medium cleansed and relieved of the accumulations with the greatest facility, and to pass a free supply of unfiltered water whenever this is required. To this end I provide a filteringstonc, tightly lllllJU lklt'tl in a nieialiie (using by means of cement, so as to form an immovable concrete or solid mass, the filtrate being taken from the rear of the stone, while the front of the case forms a chamber for unfit tered water, in which is contained a sweep carrying a sponge or other wiper for cleansing the face of the stone, the shalt of the wiper passing out through astul'li1ig-botv,aiul having a crank on the outside-for operating it. The service-inlet opens into the aforesaid waterchamber and the discharge-faucet connnnni- (ates therewith for delivering unfiltered water freely without interference with the filtering apparatus. A deflector is provided within the said water-chain])cr to direct the current upward in contact with the moving sponge, by which means the opening of the dischargefaucet, while the wiper is carried around against the face of the stone, effects a quick and then ough cleansing of the latter and carries offthe accumulated impurities.

In order that my invention may be more clearly understood, will proceed to describe a practical embodiment of it as represented in the accompanying drawings, in whieh-- Figure 1 is a vertical section of the apparatus. Fig. If is an inside view of the faceplate or front of the casing, showing also the sweep and wiper. Fig. lll is a front view of the apparatus.

The casingl is preferably made of cast-iron, of suitable size and proportions to receive a filtering-stone, 2, which, for ordinary domestic use, maybe six inches in diameterand one- 12, for attachment to the service-pipe half inch (more or less) in thickness. This filtering-stone is tightly set in the casing by means of hydraulic cement, 3. The front of the casing is closed by a faceplate, 4, secured toa flange thereon by means of bolts 5. In

the center of the faee-platc4 is a stuffing'box, 6, in which works a shaft, 7, having a crank, 8, on the outside, and a sweep-arm, 9, on the inside, carrying a wiper, 10, of sponge or other suitable material, to cleanse the face of the stone by a rotary movement produced by..

means of the crank 8. It will be observed that the casing 1 has sufficient depth in excess of the thickness of the filtering-stone 2 to provide in front of said stone a chamber,in which thesweep-arm 9 and wiper 10 work,and which, \Vllllt' {luapparatns is in position for use, is coustantlyfilled with unfiltered water. A bay or depression, 11, in the lower part of the easing is provided with a screw nozzle or collar, 13, as represented in Fig. 1'.

in front of the bay or depression 1 1 the faceplate 4 is provided with a dischargefitucet of any connnon construction, and within the bay or depression is a deflector, 15, interposed between the inlet 12 and the discharge'faucet 11, so as to direct the current upward in front of the filtcringstonc and in contact with the sponge or wiper 10.

The filtered water is discharged through a pipe-or nozzle, 16, in the rear of the casing, and preferably in the center, which communicates through a conducting-pipe, 17, witha suitable reservoir, 18, having an overflow, 19. This reservoir may have a simple cover, to 1% lifted off at any time for dipping water out, or it may have a faucet shown for drawing off filtered water; or it may constitute a water cooler of any construction. The face-plate is provided with a plug, 20, through which the wiper or cleansing material may be introduced and removed, so that it can be replenished when necessary.

Operation: It will be observed. that the application of this filterto the servicc-pipe'in no manner interferes with the free dischargc'of unfiltered water, which is drawn off at any time through the faucet 14; or, if preferred, the dischargepi pe may of course be carried to another part ot'thc house.

By the Svat'erneSsure in the chamber of the .being quite frail. To obviate this diflicnlty, I filter filtered water; is constantly delivered have devised the plan of setting the back of through. the conducting-pipe 17 to the reserthe stone in cement, so that it is permanently vpir 18, so that a filter of small dimensions-- united to the casing in an immovable concrete 5 as, for example, six inches in diameter-will mass without chambers or spaces at back of 6c iurnishs'ufficient drinking-water for a family; sufficient area to "endanger the loosening or but it is well known that filters operating uncracking of the stone by alternating or counder constant pressure become quickly foul by ter pressure. I Y the accumulation ofimpurit'ies in or upon the Having thus described my invention, the m filtering medium, and in the case of the filterfollowing is what I claim as new therein and 6 ing-stone thisaccumulation quickly closes the desire to secure by Letters Patent: pores of the stone to such an extent as to se- 1. A filter constructed with acasing or supriously interfere with the percolation of the port'for the filtering medium, a solid filtering water. Myinvention effectually obviates this medium exposed to the liquid in front and r difficulty by providing ready means for cleansembedded in cement affording a uniform bear 7o ing the face of the stone. The faucet 14 being ing at back in opposition to the ressure of opened, the water flows freely throughit from the liquid, and a suitable conduit to carry olf the service-pipe, and, beingdirected upward the filtrate which percolates through the filter into'the filtering-chamber by the deflector l5, ing medium, substantially as set forth. 20 is thrown in contact with the sponge 10, as this 2. The combination of the casing 1, solid 75 is carried around by the sweep-arm 9. The filtering medium 2, firm] y bedded therein withwhole body of water in the filtering-chamber out a rear chamber, and the outletpipe 16,

is thus agitated and quickly changed, the communicating with the interior of the body sponge thoroughly washed, and theface of the or substance of thestone, so as to receive the 2 stone sufficiently cleansed to keep the filter in water percolating therethrongh, substantial] y so a thoroughly eil'ective condition. Any suitaas set forth. I ble material may be used for the wiper 10; but -3. A pressure-filter constructed with a cas- I have found sponge preferableto a brush, for ing, 1, a filteringstone, 2, fixed immovably the reason that whileit cleanses the face of the therein in a bed of cement, 3, to afford a uni- 0 stone sutficientlyto keep it in effective condiform bearing over its entire back, a suitable 85" tion it leaves a slight film thereon, whit-his inlet, 1.2, outlet 14, for discharge of unfiltered" desirable to protect; the stone from wear and wateiya-nd a separate outlet, 16, for filtered disintegration to which this porous variety of water, substantially 'as set forth. stone is subject. 4. The combination of a solid filtering me- 3 The 'beddingfof the stone within the casing dium set in a casing forming a water-chamber 1. by means of cement is of great practical imin front, a revolving shaft in said casing, a port'ance in that it aifords auniform and uncurved wiper-arm carried by said shaft, in changeable bearing to the stone, preventing width nearly equal to that of the said water= liability to fracture,and avoiding the dilliculty chamber, a detached or removable wiper of 0 which would otherwise exist from the gradual sponge or other suitable material carried in 5 separation of the stone from its casing by the front of the curved wiper-arm by its rotary -freqnent change in pressure caused by the -move1nent, as herein explained, and a snita openingand closing of the dischargefaucet. ble plug or opening, by which the sponge or I am awarethatfiltering-stone has been used like wiping material may be introduced and 5 in pressure-filters both in the form of hollow removed. Io

cylinders and flat slabs set in the casing by 5. The combination of the vertical filtering cement around the edges and leaving a chammedium 2, revolving wiper-arm 9, soft wiper ber or'reeeptacle for filtered water at back; 10, carried thereby, and deflector 1-5, throwing but I have found by experiment that with a the water-pp into the path of the wiper, as ex- 50 pressure-filter having a free discharge-faucet plained.

for unfilteredwater communicating with the space in front of the stone the sudden changes p E MAS .HUTOHINSON' in pressure caused by the frequent opening of Witnesses: such discharge-faucet result in loosening and I OGTAVIUS KNIGHT,

55 ultimately breaking the stone, the material UnAuLns l". l)ii-rl.'m. ion. 

